Which of the following reactions does not tak | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Let's analyze each reaction:$A$: This is an elimination reaction involving a substituted benzene ring with a strong base $(KNH_2)$. This can proce

Vedclass · Accepted Answer

$2-$bromo$-1-$methoxy$-3-$methylbenzene + $KNH_2$ / liq. $NH_3$ $\rightarrow$

Vedclass · Answer

(A) Let's analyze each reaction:$A$: This is an elimination reaction involving a substituted benzene ring with a strong base $(KNH_2)$. This can proceed via a benzyne intermediate.$B$: tert-butyl chloride + aq. $KOH$ is a nucleophilic substitution $(S_N1)$ reaction,which readily occurs to form tert-butyl alcohol.$C$: tert-butyl chloride + alc. $KOH$ is an elimination $(E2)$ reaction,which readily occurs to form isobutylene.$D$: Chlorobenzene + $NaOH$ $(300^{\circ}C, 200 \ atm)$ is the Dow process,which occurs to form sodium phenoxide.Wait,re-evaluating $A$: The starting material is $2$-bromo-$1$-methoxy-$3$-methylbenzene. The $KNH_2$ in liquid $NH_3$ is a very strong base. It can abstract a proton from the ortho position to the bromine to form a benzyne intermediate. However,in this specific molecule,the ortho positions are occupied by a $-CH_3$ group and a $-OCH_3$ group. There is no ortho-hydrogen available for the formation of the benzyne intermediate. Therefore,this reaction cannot proceed via the benzyne mechanism.

Which of the following reactions does not take place?

Similar Questions

Identify the product formed from chlorobenzene on heating with conc. $HNO_3$ in the presence of conc. $H_2SO_4$.

Which of the following reactions yields biphenyl from chlorobenzene?

Identify the major product of the following reaction: $C_6H_5Cl + Br_2 \xrightarrow{\text{Anhyd. } FeCl_3} ?$

Which of the following gives only one monosubstituted product upon further electrophilic substitution?

Which of the following reactions is a $Wurtz-Fittig$ reaction?

Vedclass Test Series

Exam Paper Generator

Online Exam Module